Patent US3027619A successfully refreshed from Google Patents.
Patent US3283025A successfully refreshed from Google Patents.
US3283025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon purification
Assignee: Monsanto Co
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Filing: 1963-12-31
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Granted: 1966-11-01
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Expires: 1983-12-31
Abstract
No abstract record available.
Inventors
- 👤 Robert E Lenz
- 👤 George D Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:39
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A PROCESS FOR THE PURIFICATION OF AN IMPURE NORMALLY GASEOUS HYDROCARBON FRACTION SELECTED FROM THE GROUP CONSISTING OF MONOOLEFINIC HYDROCARBONS, POLYOLEFINIC HYDROCARBONS AND ACETYLENIC HYDROCARBONS HAVING AS IMPURITIES SMALL AMOUNTS OF NITROGEN-CONTAINING ORGANIC COMPOUNDS WHICH COMPRISES PASSING SAID IMPURE HYDROCARBON FRACTION THROUGH AN ADSOPRTION ZONE BEING SILICA GEL, THE TEMPERATURE OF SAID ADSORPTION ZONE BEING APPROXIMATELY -70 TO 140*C. SELECTIVELY ABSORBING SAID NITROGEN-CONTAINING ORGANIC IMPURITIES ON SAID SILICA GEL, CONTINUING SAID ADSORBING UNTIL SAID SILICA GEL HAS ADSORBED ITS MAXIMUM CAPACITY OF SAID IMPURITIES, STOPPING THE PASSAGE OF SAID IMPUE HYDROCARBON FRACTION THROUGH SAID ADSORPTION ZONE, SUBSEQUENTLY REGENERATING SAID SILICA GEL BY PASSING AN INERT GAS THROUGH SAID ADSORPTION ZONE MAINTAINED AT A TEMPERATURE OF 220 TO 275*C. UNTIL THE SILICA GEL IS REGENERATED, AND THEREAFTER AGAIN PASSING AN IMPURE HYDROCARBON FRACTON THROUGH SAID SILICA GEL.
Claim 2
Dependent Claim
136 words
A PROCESS FOR THE PURIFICATION OF AN IMPURE NORMALLY GASEOUS HYDROCARBON FRACTION SELECTED FROM THE GROUP CONSISTING OF MONOOLEFINIC HYDROCARBONS, POLYOLEFINIC HYDROCARBONS AND ACETYLENIC HYDROCARBONS HAVING AS IMPURITIES SMALL AMOUNTS OF NITROGEN-CONTAINING ORGANIC COMPOUNDS WHICH COMPRISES PASSING SAID IMPURE HYDROCARBON FRACTION THROUGH AN ADSOPRTION ZONE BEING SILICA GEL, THE TEMPERATURE OF SAID ADSORPTION ZONE BEING APPROXIMATELY -70 TO 140*C. SELECTIVELY ABSORBING SAID NITROGEN-CONTAINING ORGANIC IMPURITIES ON SAID SILICA GEL, CONTINUING SAID ADSORBING UNTIL SAID SILICA GEL HAS ADSORBED ITS MAXIMUM CAPACITY OF SAID IMPURITIES, STOPPING THE PASSAGE OF SAID IMPUE HYDROCARBON FRACTION THROUGH SAID ADSORPTION ZONE, SUBSEQUENTLY REGENERATING SAID SILICA GEL BY PASSING AN INERT GAS THROUGH SAID ADSORPTION ZONE MAINTAINED AT A TEMPERATURE OF 220 TO 275*C. UNTIL THE SILICA GEL IS REGENERATED, AND THEREAFTER AGAIN PASSING AN IMPURE HYDROCARBON FRACTON THROUGH SAID SILICA GEL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |